Improvement in wrenches



H. Mommas.

WRENCH.

No. 186,954. Patented Feb. 6, 1877.

Witnesses: P Inventor.

N-PETERs, PHDTO-LITNDGRAPNER. WASHINGTON. D. C.

FFIGQ HENRY RICHARDS, OF NEW BRITAIN, CONNECTICUT.

IMPROVEMENT IN WRENCHES.

Specification forming part of Letters Patent No. 186,954, dated February 6, 1877 application filed July 17, 1875.

.Worcester, June 9,1857, together with the improvements thereon, in which this my present invention consists.

Ais the handle of the wrench, usually made hollow to lighten the same, one end being square to serve as a socket-wrench, E. Upon the other end of the handle,which is widened into a head of the general form shown, is formed a jaw in one piece therewith, and in a suitable passageway or channel is a jaw, B, sliding freely therein toward and away from said fixed jaw. B is a series of notches or teeth, meshing into the thread of a worm, C, which revolves upon pin 1), and within a mortise through, or recess in, the head of the wrench.

I have in the preceding described that portion only of the wrench shown in the accompanying drawing that is old, and which I disclaim as constituting any part of my invention.

In practice it is often desirable to grasp the wrench, in using it, in the hand in such man- In the lower side of said jaw ner that the thumb may be upon the worm C to operate the same 5 but, under many circumstances, this is found impossible for want of room, or other cause, as well as the large size of some wrenches. The object of my present invention is to obviate this difficulty which I do by the employment of one or more thumbwheels, D, geared with worm C, arranged, as shown, in the mortise or slot lengthwise of the handle. By this means the workman is enabled to grasp the wrench at a greater distance from the jaws, and still operate the jaw B with this thumb, than without this improvement and he may increase this distance at pleasure by making a longer mortise or slot, and arranging a number or gears meshingwith each other therein, the number to be used depending somewhat upon their size.

Iprefer the thumb-wheel D should be a gear; but a friction-wheel, X, can be used instead.

Having thus described my invention, I claim In a wrench where a movablejaw moves at rightangles to the handle, the combination of a thumb-wheel, D, externally geared into a pinion, E, at the end of the worm C, the pinion being placed in a recess in a slot running lengthwise of the handle.

HENRY RICHARDS. Witnesses:

F. H. RICHARDS, JACOB Rrrz. 

